corespinlockimpl.h

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/*
 *  COPYRIGHT (c) 1989-2008.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.org/license/LICENSE.
 */

#ifndef _RTEMS_SCORE_CORESPINLOCKIMPL_H
#define _RTEMS_SCORE_CORESPINLOCKIMPL_H

#include <rtems/score/corespinlock.h>
#include <rtems/score/watchdog.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef enum {
  CORE_SPINLOCK_SUCCESSFUL,
  CORE_SPINLOCK_HOLDER_RELOCKING,
  CORE_SPINLOCK_NOT_HOLDER,
  CORE_SPINLOCK_TIMEOUT,
  CORE_SPINLOCK_IS_BUSY,
  CORE_SPINLOCK_UNAVAILABLE
}   CORE_spinlock_Status;

#define CORE_SPINLOCK_STATUS_LAST CORE_SPINLOCK_UNAVAILABLE

#define CORE_SPINLOCK_UNLOCKED 0

#define CORE_SPINLOCK_LOCKED   1

void _CORE_spinlock_Initialize(
  CORE_spinlock_Control       *the_spinlock,
  CORE_spinlock_Attributes    *the_spinlock_attributes
);

CORE_spinlock_Status _CORE_spinlock_Wait(
  CORE_spinlock_Control  *the_spinlock,
  bool                    wait,
  Watchdog_Interval       timeout
);

CORE_spinlock_Status _CORE_spinlock_Release(
  CORE_spinlock_Control *the_spinlock
);

RTEMS_INLINE_ROUTINE void _CORE_spinlock_Initialize_attributes(
  CORE_spinlock_Attributes *the_attributes
)
{
  the_attributes->XXX = 0;
}

RTEMS_INLINE_ROUTINE bool _CORE_spinlock_Is_busy(
  CORE_spinlock_Control  *the_spinlock
)
{
  return (the_spinlock->users != 0);
}

#ifdef __cplusplus
}
#endif

#endif
/* end of include file */